Hello all.
After much conversing and intelligence gathering, I have finally built my first every PC - my ticket to the master race. I went an ITX build because I want to take it to LAN parties, even though many people have voiced their opinion that master race newborns should not dabble with ITXs.
Anyhow, here are the parts:
CPU: Ryzen R5 1600
Graphics card: ASUS DUAL GTX 1070 O8G
RAM: 2x8GB Corsiar Vengeance 3200MHz
Storage: 250GB SanDisk Ultra II SSD
Storage: Seagate Barracuda 2TB 7200RPM HDD
MOBO: Asrock Fata1ity Gaming/ITX AB350
PSU: Corsair SF450
Case: Silverstone SG13
CPU cooler: Noctua - NH-L9x65
Front intake fan: Noctua NF-F12 PWM
Exhaust fan: Fractal design R3 50mm
Monitor: LG23MP68VQ
Keyboard: TurtleBeach Impact 600
Misc:
SFX to ATX power supply adaptor bracket PP08
ASUS SDRW 08D2S-U LITE
Tights, 20 Denier
Corsair CP-8920190 Sleeved SATA Cable, Red/Black
TAAADDAAA~~~
You have no idea how excited and happy I was
Of note: Asrock have 'fixed' their VRM heatsink-thermal pad issue:
White GPU, Red/Black mobo, Poo-y CPU cooler... Yea, the colour scheme is all wrong and miss matched. But who cares as long as I like it!
It's alive!!!
Now time to prep the case:
I do like Asrock's IO shield:
At this point, I thought cable management will be easy. I mean, there is so much room. What's all the fuss about?
Errr getting a bit cosy now...
Note: I had to get a different Corsair's SATA power cable as the one that came with the PSU aren't flat enough. I do like the red and black, and also the fact that its individually sleeved though.
ARGHHH cables everywhere! And why do they have to be so stiff??
This is the best I can manage. Not bad for a first time builder...?
And here is the finished product!
What's the abomination I hear you ask?
Well.
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I used lady's tights as dust filter, and it is SO hard to get right. It ended up looking like this form the inside:
Yea...
Next up will be benchmarks and my attempts at OC!
Thanks for reading!

Good luck getting the RX580 in reasonable time. But if you don't mind waiting, pre-order the £219 Sapphire pulse one from amazon - it's at a very good price.
Otherwise, get a 1070. http://www.ebay.co.uk/itm/EVGA-GeForce-GTX-1070-SC-ACX-3-0-Black-Edition-8GB-GDDR5-VR-Ready-Graphics-Card-/132327855431?epid=1582910066&hash=item1ecf5ad547:g:~4sAAOSwtRBZuTsk

I've been holding off for 2.5 months to buy the RX 580. Contacted Sapphire and Gigabyte in late August ,and both had 'no idea' when they can finishing meeting the demand of miners and get enough cards onto the market. The Sapphire rep said:
"We need to be patient, the production is scaling and the throughput of GPU factories is growing. We're not there yet, but it's getting a tiny bit better. There's hope!"
I eventually gave in and got the GTX 1070 - slightly inflated in price, but a) I get a card, so my other parts don't need to lay around anymore, and b) it's more 'future proof', and most importantly c) they are in bloody stock.

Apologies for dwelling on this matter. Your opinions are appreciated.
I have decided to blow my budget and get the GTX 1070. I am considering two models that are at similarly ‘low’ prices (~£400):
Asus GTX 1070 Dual OC
EVGA GTX 1070 SC Gaming Black Edition ACX 3.0
I really do not like EVGA’s exterior design, so in the looks department, I’m more incline to get the ASUS. ASUS also has 6 phases, compared to EVGA’s 4. It is also SLIGHTLY higher OC’ed.
However, EVGA do have (much?) better cooling, and this model is ‘more reputable’.
What do you guys think? How much did the aesthetics of parts influence your build?

There aren't any cheap second hand GTX 970 in the UK. Or rather I refuse to pay £170+ for a 2 year old warranty expired card that originally cost £240
Looks like I'll go for the 1070. I've found a Superclocked black edition of it for £408, and is new. Is that a good deal? Will my PSU handle the system? (i think it will, but would like a second opinion.)